Intermediate-range order in simple metal-phosphate glasses: The effect of metal cations on the phosphate anion distribution
The technique of high-performance liquid chromatography (HPLC) has been used to probe the phosphate anion distribution in a variety of metal phosphate glasses including glasses made with trivalent metal cations (Al, In, Ga, La). The composition of each glass was chosen so that the average phosphate chain length was between 2 and 4 PO{sub 4} tetrahedra. The widths of the resulting phosphate anion distributions were determined directly from an analysis of the HPLC chromatograms. Literature values for the free energy of formation of the crystalline metal-orthophosphate compounds with respect to P{sub 2}O{sub 5} and the metal oxide, were compared to the chromatogram widths. It was found that the smaller the energy of formation, the wider the distribution of phosphate chains, and the greater the ease of glass formation.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- OSTI ID:
- 539888
- Report Number(s):
- CONF-9709101-1; ON: DE97008488; TRN: 97:005519
- Resource Relation:
- Conference: 7. international conference on the structure of non-crystalline materials, Laguna (Italy), 15-19 Sep 1997; Other Information: PBD: Jun 1997
- Country of Publication:
- United States
- Language:
- English
Similar Records
Structure and dynamics of phosphate glasses: From ultra- to orthophosphate composition
Development of Iron Phosphate Waste Forms for Fission Products Waste Streams